Control for hauling scrapers



N 7, 1944 M. M. BRODERSEN 2,361,914

CONTROL FOR HAULING SCRAPERS Filed March 21, 1941 4 Sheets-Sheet 1 I N VEN TOR:

Nov, 7, 1944. M. M. BRODERSEN CONTROL FOR HAULING SCRAPERS Filed March 21, 1941 4 Sheets-Sheet 2 INVENTOR:

Nov. 1,1944.

M. M. BRODERSEN CONTROL FOR HAULING SCRAPERS Filed llarch 21 1941 4 Sheets-Sheet 3 I l l l h H l u H h l l l l h INVENTOR:

, Nov. 7, 1944.

M. MBRODERSEN CONTROL FOR HAULING scRAPERs Filed March 21, 1941 4 Sheets-Sheet 4 m m m Patented Nov. 7, 1944 UNJYTETD STATES PATENT OFFIGE oiiio; a' corp ration of Ohio" Application- Memh 21, 1941, semi No. 384 534 11 Claims. (Cll 37--12.6)

This invention. relates generally to hauling" sctapers hunting a, bowl: aim-d a closure or 31131 011 for the receiving end of the" bowl; and is an improvementin the means foxcontiohing: the opening and closing of-the apron.

Henetoforetin s'orapersof this type-thetutingl on the bowl and the" opening and closing of the amenities been effected a; predetermined order by! aws'ingle cable. This cable was, associated with thwbowl the ap'rotw and a": hoist om the tractor, swthat upon winding the cable on the hoist, the a ron, by virtue of: being lighter in Weight than the'bdw1,;-wou1d open first. fl'hen upon further pulling'ofi the-cable, the bowl would be tilted for discharging; andconversely by releasing the ca-- me; thebowl would= he first returned to its horizontal position", then, upon further releasing of the-cable; the avprcin would be closed. 1

By" reason on this sequential positioning of the bowl, and the apron, the implement could not be onerated at a;- high degree of eflicienoy, because the operators attention hed to be di-vided between forward observat'ion ot the terrain over which the tvaotbr'was driven and the reayrward observe tioh of the implement to" control the" degreeof operation.

F03 example: As the tractor is moved to the digging location and the cableis released to lower the-" bowlinto the soraipingi position the open-titer" hm?to=ti1rn reanvVard-ly to'see that just enough of the cable was released to position the bowl With outthe apron closing, sothat the apron did not interf'ere'with thestamping?operation. Then after the scraping operation was completed; and the bow-L is being raised to the carrying position, the

operator also had' to see that the apron waislowetedioclbseth receiving" end or the bowl-at the proper time to prevent spilling part of the" load. Furthermore, time was'wasted by the operatorinw-aiting! until the apron was raised to its fill-lyopened position before the bowl could be tiltedfor Gum-ping the load and in closing the apron after the bowl has reached its normal" position;

Another objection to the single cable control was that the Weight of the apron counter-bal aneeda proportionate amount of the bowl the bowl and the apron are inter-connected ing: ot the" nece ifiihg end of the bowl being; auto matioall'y regulated l in proportion to the depth ofi the digging? operhtiomito insu re efficient and compact entry of earth in't'o thebdwl inany vol lime-Within the'worhing flange of= the implement Thus, by means of this invention, gr'eelter efiihienoy in operation of the scraper" is effected:-

because the opening, closlhgend reguletlngof the apron; inproportion to the digging! operation, is entirely automatic; ankle donsequently, requires no" attention on the part at the oper'sitorwho can now direot all ofi his eibflentio'ri to simply loading: anti: disehm g i ng the bo wlt Furthermore; the-weight" of the apron assists in returning the" bowl f rom the tilted: to" its no'rmetl positiona Withithesoand other olijctsin viewhthe invem tion consists in thcombinotiongi correlation and construction of parts; members ind features which with be described the speoifioation and will-'- be finally pointed "out in the" claims-z Referring: to the dtawings Figure 1 is" azplan view oi the scraper-embodyirig my invention.

- Figure 2 it a sectional elevation taken on line Z rZ in -FiQ'une 1 showing the s'oiaper in the dig ging position.

Figure 3 13* a side elevation o'f the Sofaflef in themed-carrying position.

Figure 4 is a? section similar to Figure 2} but showingithe' scraper in the load-"dumping position Figure 5 iii a! dihg ram showing: the cable errangemehfi for controlling: the bowl closureu In the dl awihlg's the i'hverlfioh is illiili'fi'reified" in one? ofits" iorm's' of embodiment ale inc'briioflited in an implehaent hawin atfrtime str ilotore sihiilbin to that shown al my demeaning doplihtitiofi Serial mae'zegsevimau Fbi uary 1 1, 1 94-1 The cross member I4. The cross member :4 has centrally interposed between the ends thereof, a forwardly extending and downwardly depending leg I5 which is swivelably supported, as at I6, on a wheeled carriage I! which in turn is adapted for connection to a tractor in the usual manner.

A secondary frame I8, interposed between the side members I I of the primary frame, comprises a pair of spaced apart side plate members I9 having a generally trapezoidal contour. The side plates l9 are rigidly connected at the forward ends to a tubular cross member 20 and are supported at the rear ends on the axles I2, as at I9a, adjacent the outer sides of wheels I3.

The rear ends of the side plates I9 are rigidly inter-connected by a fabricated framework which includes a transverse cross member 2I securely connected at the ends to said side plates I9, a pair of spaced apart vertical arms 22 which are centrally positioned and are secured at the lower forward corners to the cross members 2|, a cross member 23 rigidly interposed between the rear vertical arm 22 and side plate I9 respectively, a cross member 24 rigidly interposed between the left vertical arm 22 and side plate I9 respectively, a rearwardly extending triangular arm plate 25 positioned adjacent the inner side of the right wheel I3 and secured to the cross members 2I and 23 respectively, and a rearwardly extending triangular arm plate 26 positioned adjacent the inner side of the left wheel I3 and secured to the cross members 2| and 24 respectively. Both arm plates 25 and 26 are supported on the right and left axles I2, as indicated at 25a and 26a respectively. A cross member 21 is interposed between the arm plates 25 and 26 and carries, rigidly secured thereto, the lower rear corners of the vertical arms 22. The upper ends of the vertical arms 22 are rigidly inter-connected by a tubular cross member 28, on which is mounted a block of three sheaves 29.

The side elements II of the primary frame structure are provided with upwardly extending brackets 30 which are connected at the upper ends thereof to a tubular cross,member 3| which in turn has secured thereto, intermediate its ends, a block of five sheaves 32. The tubular cross member 20, at the forward end of the secondary frame I8, has secured thereto, intermediate its ends, a block of three sheaves 33.

A cable 34, anchored or dead-ended at the cross member 3 I, as at 35, is reaved between three of the sheaves 32, on the primary frame I0, and two of the sheaves 33, on the secondary frame i8, and is then passed under a sheave 36 on the cross member I4, over a sheave 31 on the leg I5, passed through a swiveled sheave 38, and connected to a suitable power-controlled hoist on the tractor.

By pulling and releasing the cable 34, vertical swinging movement is imparted to the secondary frame I8 about the axles I2 of the rear wheels I3, thereby raising and lowering the implement.-

A bowl 39, comprising a bottom 40, a. back 4|, and side members 42, is supported at the forward end on a pair of links 43. The links 43 are pivotally connected at their lower ends to the bowl side members 42, as at 44, and at their upper ends to the side plates I9 of the secondary frame, as at 45. The lower rear corners of the bowl side members 42, are provided with rearwardly extending brackets 46 which carry at the outer ends thereof rollers 41. The rollers 41 are guided in vertical channels 48 which are secured to the inner surfaces of the secondary frame plate members I9. A block of two sheaves 49 is secured to the back of the bowl at the bottom edge thereof. A cable 50, dead-ended as at 5| at the cross member 28, is reaved between two of the sheaves 29 on the secondary frame, and one of the sheaves 49, on the bowl 39, and is then passed over one of the sheaves 32 on the primary frame, over a sheave 52 on the cross member I4, over a sheave 53 on the leg l5, passed through a swivel sheave 54, and connected to a power controlled hoist on the tractor.

By exerting a pulling force on the cable 50, the rear end of the bowl 39 is raised vertically, by virtue of the guide rollers 41 in the vertical channels 48. The upward movement of the rear end of the bowl causes the forward end of the said bowl to swing rearwardly on the links 43, thereby'tilting the bottom of the bowl to discharge the load, as may be observed in Figure 4. Stops 54 and 55 are provided at the upper and lower ends, respectively, of the channels 48, to limit the raising and lowerin positions of the rear end of said bowl.

A closure or apron 56 is provided for the receiving end of the bowl to retain the load during transportation. The closure '56, includes a pair of arms 51 which extend rearwardly and are pivotally supported at their rear ends on the side plates l9, as at 58. The apron 56 is provided with a forwardly extending bracket 59, to which one end of a cable 60 is connected, as shown at 6|. The cable 60 is passed over one of sheaves 33 on the forward end of the secondary frame I8, over one of the sheaves 32 on the cross member 3I of the primary frame I0, over one of the sheaves 29 on the cross member 28 at the rearof the secondary frame, under a sheave 62 joumaled on a shaft 63, supported between the vertical arms 22 near the lower ends thereof, over one of the sheaves 49 at the back of the bowl 39, and dead-ended at the rear of the bowl, as at 64. (See cable diagram in Figure 5.)

The bowl closure 56 is controlled by the tilting of the bowl 39 and by the raising and lowering of the secondary frame I8. Figure 3 shows the implement in the load carrying position, wherein the bowl is raised above the ground surface. The cable 60 is just long enough to support the apron 56 in the closed position at the receiving end of the bowl, to prevent spilling of the dirt during transportation.

By reason of the inter-connecting cable 60, the

opening and closing of the apron 56 is simultaneously elfected, in a proportionate degree, by the tilting and the restoring of the bowl respectively. Figure 4 shows the bowl tilted for discharging the 'dirt wherein the cable 60 is pulled by the elevation of the rear end of said bowl to raise the apron 56 into the open position.

The inter-connecting cable 60 is passed over one of the sheaves 32 on the fixed primary frame II] to support the apron in the closed position which is slightly above the ground surface as shown in Figure 3, so that the bowl 39 may be lowered into the scraping position by swinging the secondary frame I8 downwardly, without affecting the position of the apron, Thus, the scraping end of the bowl is dropped away from the apron to provide. an opening for admittance of the scraped up dirt into the bowl and the size of said opening is thereby automatically controlled in proportion to the depth of the scraping operation.

Upon completing the scraping operation, the loaded bowl is simply raised up to the apron toclosethereceiving end of the bowl for transportatlon. i i 1 Having thus described my invention, I claim:

1, A scraper comprising a fixed primary frame, a vertically swingable secondary frame, a; tiltable scraper bowl on said secondary frame, a verticallyswingable closure for the receiving end of said bowl mounted on said secondary'frame, a cable connecting the bowl to the bowl closure to open said closure by raising it simultaneously with the tiltingcf said bowland to close said closure by lowering it simultaneously with the returning of said bowl to the horizontal position, means for supporting said cable on said primary frame to open the receiving end of said bowl by dropping said receiving end away from said closure while lowering said bowl into the scraping position uponswinging said secondary frame downwardly, thereby providing an opening proportionate in size to the depth of the scraping operation to admit the scraped up material into the bowl.

2. A scraper comprising a fixed primary frame, a vertically swingablesecondary frame, a tiltable scraper bowl on said secondary frame, a vertically swingable closure for the front end of said bowl on said secondary frame, a cable connecting said closure to the rear end of said bowl to open said closure by raising it simultaneously with the tilting of said bowl and to close said closure by lowering it simultaneously with the returning of said bowl to the horizontal position, said cable being associated with said primary frame to control the opening of the receiving end of said bowl by dropping said receiving end away from said closure when lowering said bowl into the scraping position upon swinging said secondary frame downwardly, thereby providing an opening proportionate in size to the depth of the scraping operation to admit the scraped up material into the bowl. 1

3. A scraper comprising a primary frame, a vertically movable secondary frame, a tiltable scraper bowl on said secondary frame, a closure for said bowl, pulleys on said primary and secondary frames, a cable interconnecting said bowl closure and bowl, said cable being passed over the pulleys so that the bowl closure may be controlled in one instance by the tilting of said bowl and in another instance by moving said secondary frame.

4. In a scraper comprising a fixed primary frame, a verticall movable secondary frame, a tiltable scraper bowl mounted on said secondary frame, a'closure for said scraper bowl mounted on said secondary frame, a cable interconnecting J said bowl and bowl closure, said cable being passed over pulleys arranged on said primary and secondary frames so that said closure may be controlled by movement of the secondary frame while said bowl is held fixed relative to said secondary frame and so that said closure may be controlled by the tilting movement of said bowl while the secondary frame is held fixed relative to said primary frame.

5. A scraper comprising a fixed primary frame, a vertically movable secondary frame, a tiltable scraper bowl on said secondary frame, a closure for said bowl mounted on said secondary frame, means interconnecting the bowl and the bowl closure, said interconnecting means being associated with said primary and secondary frames so that said bowl closure may be opened and closed either by respectively moving the secondary frame down and up or by respectively tilting Cry the bowl for discharging and returning said bowl to the carrying position.

6. A scraper comprising a primary frame, a vertically swingable secondary frame, a tiltable scraper bowl on said secondary frame, a closure for said bowl mounted on said secondary frame, a cable interconnecting the bowl and the bowl closure, said cable being passed over pulleys arranged on said primary and secondary frames" so that said bowl closure may be opened and closed in one instance by tilting the bowl for discharging and returning it to the carrying position respectively and another instance by frame and thereby the blade; the combination therewith of: interlocking rope means, operatively connecting the apron to the main frame, to one of the ground supports, and to the bowl, in such a way that, whenever either the main frame is lowered, or the bowl is moved to dump, this motion will raise the apron.

8. In a scraper, having: ground support; a main frame, supported thereby in such manner as to be raisable and lowerable with respect to the ground; a digging blade, carriedby the main frame; a dumping and dirt-holding bowl, pivoted to the main frame adjacent the blade; a front apron, pivotally supported by the main frame, and adapted, when lowered, to retain dirt within the bowl; and means to raise the main frame and thereby the blade; the combination therewith of interlocking rope means, operatively connecting the apron to the main frame, to one of the ground supports, and to the bowl, in such a way that, whenever either the main frame is lowered, or the bowl is moved to dump, this motion will raise the apron; and that a reach of this rope extends rearwardly from the bowl to some other portion of the scraper with respect to which other part the bowl is relatively movable during dumping, thus tending to initiate the return of the bowl from dumping position to dirt-holding position.

9. In a scraper, having: ground support; a digging blade, supported thereby; a main body, supported by the ground support, in such manner as to be raisable and lowerable with respect to the ground; a dumping element, supported by the ground support, and adapted to extrude dirt, and capable, in conjunction with the main body, of serving as a main dirt-container; a raisable front apron, adapted when.

lowered to retain dirt within the main dirt-container; means to raise the main dirt-container and thereby the blade; and means to cause the dumping element to extrude dirt; the combination therewith of: interlocking means, operatively connecting the apron to the ground support and to an element which rises and falls with the blade, in such a way that the lowering of the blade will raise the apron; and other means, operatively connecting the apron to the ground support and to a source of power, for

raisingthe apron, when the blade has been raised.

10. In a scraper, having: ground support; a main frame, supported in such manner as to be raisable and lowerable with respect to the ground; a digging blade, carried by the main frame; a dumping and dirt-holding bowl, pivoted to the main frame adjacent the blade; a front apron, pivotally supported by the main frame, and adapted, when lowered, to retain dirt within the bowl; and means to raise the main frame and thereby the blade; the combination therewith of: interlocking rope means, operatively connecting the apron to the main frame and one of the ground supports, in such a way that the lowering of the main frame will raise the apron; and other means operatively connecting the apron to the ground support; and to a source of power, 'for raising the apron, when the main frame has been raised.

11. In a scraper, having: ground support; a digging blade, supported thereby; a main body supported by the ground support, in such manner as to be raisable and lowerable with respect to the ground; a dumping element, supported by the ground support, and adapted to extrude dirt, and capable, in conjunction with the main body, of serving as a main dirt-container; a raisable front apron, adapted when lowered to retain dirt within themain dirt-container; means to raise the main dirt-container and thereby the blade; and means to cause the dumping element to extrude dirt; the combination therewith of interlocking means, operatively connecting the apron to the ground support and to an element which rises and falls with the blade, in such a way that the lowering of the blade will raise the apron; and other interlocking means, operatively connecting the apron to the ground support and to the dumping elements, in such a way that motion of the dumping element to ex- 20 trude dirt will raise the apron.

MAX M. BRODERSEN. 

